The Korg opsix is an "altered" six-operator digital synthesizer, which goes well beyond the classic DX7 to combine FM synthesis with subtractive synthesis, wavefolding, ring modulation, multi-effects, and other capabilities. Rishabh Rajan's new course "Korg opsix Video Manual" gets into the nitty-gritty.. The course covers every control of the opsix, showing how to master all its features, and create unique sounds. It goes over the use of the various algorithms (including customizing your own), digs into the Wavefolding mode, and shows how to use the subtractive filters. There are also sections on the Ring Modulation options, the multi-FX section, and the built-in arpeggiator, along with a deep dive into the polyphonic step sequencer and automating parameters with the motion sequencer. So if you're ready to take a big step beyond traditional FM synthesis, this course should help get the most out of the powerful capabilities of the Korg opsix.